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Re: [PATCH] xen/arm: smmuv1: remove iommu group when deassign a device
- To: Julien Grall <julien@xxxxxxx>
- From: Rahul Singh <Rahul.Singh@xxxxxxx>
- Date: Wed, 27 Jul 2022 13:27:06 +0000
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- Cc: Mykyta Poturai <mykyta.poturai@xxxxxxxxx>, Bertrand Marquis <Bertrand.Marquis@xxxxxxx>, "Volodymyr_Babchuk@xxxxxxxx" <Volodymyr_Babchuk@xxxxxxxx>, "sstabellini@xxxxxxxxxx" <sstabellini@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Wed, 27 Jul 2022 13:27:35 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [PATCH] xen/arm: smmuv1: remove iommu group when deassign a device
Hi Julien,
> On 26 Jul 2022, at 6:35 pm, Julien Grall <julien@xxxxxxx> wrote:
>
> Hi,
>
> On 21/07/2022 16:53, Rahul Singh wrote:
>>> On 28 Jun 2022, at 6:23 pm, Mykyta Poturai <mykyta.poturai@xxxxxxxxx> wrote:
>>> With this patch I get the same results, here is the error message:
>>>
>>> (XEN) smmu: /iommu@51400000: Unexpected global fault, this could be serious
>>> (XEN) smmu: /iommu@51400000: GFSR 0x00000001, GFSYNR0 0x00000004,
>>> GFSYNR1 0x00001055, GFSYNR2 0x00000000
>>>
>> As you mentioned earlier, this fault is observed because GPU continues to
>> access memory when the context is
>> already invalidated, and therefore triggers the "Invalid context fault".
>> This is a different issue and is not related to this patch.
>> @Julien are you okay if I will send the below patch for official review as
>> this issue pending for a long time?
>
> I am OK in principle. I will do a proper review on you send a formal patch.
Thanks for the confirmation. I will send the formal patch for review.
Regards.
Rahul
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